Wash water heater



API'il 16, l935- c. H. HAPGooD 1,997,904

WASH WATER HEATER Filedeb'. 1, 1955 an internal combustion engine.

perform their total detrimental effect in a veryl Patented Apr. 16, 12935 WASH WATER HEATER Cyrus Howard Hapgood, Nutley, N. J., assignor to The De Laval Separator Company, New York, N. Y., a corporation of New Jersey Application February 1, 1933, Serial'No. 654,578

1 Claim.

This invention relates to a water heater and has particular reference to a heat exchanging arrangement in which Water may be heated by the circulating` water of the cooling system of The primary utility of the invention relates to the provision of hot water for washing milking machine elements by utilizing the heat of the engine which is used to drive the vacuum pump necessary for the operation of the milking mechanism.

Heretofore it has been customary to draw the water necessary for washing of 'the parts of a milkingmechanism from the system of the engine used to drive the vacuum pump during milking. For the next use of the engine it was necessary to rell the water system with fresh water which might contain, and probably on a ,farm would contain, injurious salts or sediment whichl would either' be deposited in the cooling system of the engine or attack the metallic parts thereof. Any water normally available contains a relatively small proportion of injurious ingredients which short time either by depositing material analogous to a boiler scale or corroding the jacket walls of the engine. If this same Water is later used in the engine no further injurious effects take` place, except such as any rateVV due to oxidation.

would take place at Under the prior practice, however, in which the water was drained from the cooling system after each operation, every time the engine operated the primary injurious results Awould be repeated with the result that in an annoyingly short time repairs would be necessitated.

Furthermore it has been the practice, after drawing off the water from the jacket system, to

keep the engine running to maintain a vacuum to draw the hot wash water through the parts to be washed. rThus-the engine would run from ten minutes to one-half hour without water in the jacket.

This caused overheating with resulting warped cylinder heads, warped valve seats and pitted valves.

It is the object of the present invention to protem as mentioned above.

Specically, the invention contemplates the provision of a heat exchange device in which the circulatinghot water from the jacket of the engine passes in heatY exchange relationship with wash waterv contained in an enclosed vessel from which it may be drawn eventually for washing.

The broad object of the present invention and also specific objects relating to detailsoi con` struction will be apparent from the following description read in conjunction with the accompanying drawing in which: Y

Fig. l is an elevation partly in section of one modication of the invention;

Fig. 2 is a horizontal section through the heat exchanger; and I Fig. 3 is a similar section of a modied heat exchanger in accordance with the invention.

There is indicated at 2 a portion of an internal combustion engine provided with a cooling jacket 4 through which water circulation is maintained inthe usual fashion. Some or all of the water of this cooling system is passed through outlet and inlet passages 6 and 8 respectively which are coupled as indicated in Fig. 1 to an inlet Ill and outlet I2 respectively of a heat exchanger.

In the modification illustrated in Figs. l and 2 the inlet and outlet communicate with the space between an outer shell 'I4 and an inner shell I6 so that the hot water from the cooling system of the engine passes to an annular chamber I8 formed between the two shells. The shells are preferably anged as indicated in Fig. 1 and covered by a suitable removable cover 2B and the two flanges may be clamped together in any suitable manner. The wash water in the inner shell may be drained therefrom when desired through an outlet 22 controlled by a valve indicated at 24. Instead of providing the inner chamber with a smooth wall the wallk may be corrugated to promote heat exchange. Ordinarily, however, this' is unnecessary inasmuch as the operation of the engine is prolongedand suiifcient to bring the wash water to the proper necessary elevated temperature.

In Fig. 3 there is illustrated a modified form of the invention in which there is located within an outer shell 26 an inner shell 28 whichA receives the Cooling water of the engine through connections indicated at 30. In this arrangement the wash water is located in thel outer shell 26 f between its walls and the walls of the inner shell 28 and may be drained therefrom through Va valve controlledl outlet indicated at 32. The operation of these two modifications is of course substantially the same.

It will be obvious that variousv changes may be made in details of the invention Without departing from the scope thereof as dened in the following claim.

What I claim and desire to protect by Letters Patent is:

The method of obtaining intermittently supplies of hot Water from the Water circulating system ofv an internal combustion engine, which comprises circulating Water through, from and back to the Water jacket of the engine and in its circulation from and back to the Water jacket bringing it in heat exchange relation but out of contact with a stationary body of water which is thereby heated to a temperature approximating that of the circulating water and which, after being so heated, may be Withdrawn and replenshed at desired intervals, thereby avoiding the injurious effects Aofwithdrawing; the water of the circulating systemand replenishing` the-Water supply thereto with' freshwater.

CYRUS HOWARD HAPGOOD. 

